<html>
<body>
<head>
    <style type="text/css">
        * {
            margin: 0px;
            padding: 0px;
        }
        .head {
            width: 300px;
            line-height: 40px;
            position: relative;
            margin: 0 auto;
        }
        .drag {
            width: 300px;
            height: 40px;
            line-height: 40px;
            background-color: #e8e8e8;
            position: relative;
            margin: 0 auto;
        }

        .bg {
            width: 40px;
            height: 100%;
            position: absolute;
            background-color: #75CDF9;
        }

        .text {
            position: absolute;
            width: 100%;
            height: 100%;
            text-align: center;
            user-select: none;
        }

        .but {
            width: 40px;
            height: 38px;
            position: absolute;
            border: 1px solid #ccc;
            cursor: move;
            font-family: "宋体";
            text-align: center;
            background-color: #fff;
            user-select: none;
            color: #666;
        }
    </style>
</head>

<h2>Hello World!</h2>

</body>
<script type="text/javascript" src="assets/js/vendor/jquery-3.4.1.min.js"></script>

</html>
